Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Solar Water Heater Savings Calculator
Estimates annual energy savings from a solar water heater based on household size, fuel type, solar fraction. Use it when comparing solar thermal to conventional water heating costs.
Annual Savings
668.14 $
167.04: $140-220/person is typical when replacing electric resistance heating (2.8 factor), the most expensive fuel to offset and the fastest payback.
This is annual water-heating savings per person; per-capita savings depend heavily on displaced fuel, since electric resistance heating costs far more than gas to offset.
Solar Panel Cost Savings Calculator
Project your total 25-year net savings from going solar, accounting for electricity rate inflation and panel degradation. Use this before getting installer quotes to set realistic financial expectations.
Key differences
| Solar Water Heater Savings Calculator | Solar Panel Cost Savings Calculator | |
|---|---|---|
| Category | Solar Energy | Solar Energy |
| Inputs required | 3 | 5 |
| Result | Annual Savings ($) | 25-Year Net Savings ($) |
| What it does | Estimates annual energy savings from a solar water heater based on household size, fuel type, solar fraction. Use it when comparing solar thermal to conventional water heating costs. | Project your total 25-year net savings from going solar, accounting for electricity rate inflation and panel degradation. Use this before getting installer quotes to set realistic financial expectations. |